According to Adobe, there is a critical
vulnerability in versions of Flash Player (Windows, OS X, Linux,
Solaris) and Reader/Acrobat 9.x (Windows, OS X, UNIX). The exploit
allow a hacker to gain control over an affected system.

Even more troubling is that Adobe says
that it currently doesn't have a fix and "there are reports that
this vulnerability is being actively exploited in the wild."